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No. 625,|9l. Patented May l6, I899 .1. H. NORTHRDP. WARP STOP MOTION FORLOOMS.

(Application filed Mar. 8, 1899.) (No Model.) E

NITED STATES PATENT OFFICE.

JAMES H. NORTHROP, OF TUSTIN, CALIFORNIA, ASSIGNOR TO THE DRAPERCOMPANY, OF PORTLAND, MAINE, AND HOPEDALE, MASSACHUSETTS.

WARP STOP-MOTION FOR LOOMS.

SPECIFICATION forming part of Letters Patent No. 625,191, dated May 16,1899. Application filed March 8, 1899. Serial No, 708,174. (No model.)

To all whom, it may concern:

Be it known that I, JAMES H. Nonrnnor, of Tustin, county of Orange,State of California, have invented an Improvement in Warp-Stop-MotionMechanism for Looms, of which the following description, in connectionwith the accompanying drawings, is a specification, like letters on thedrawings representing like parts.

This invention has for its object the production of means for insuringthe uniform and proper operation of the thin flat steeldetector-heddles, employed also as actuatingdetectors inwarp-stop-motion mechanism, such detector-heddles being shown in UnitedStates Patent No. 536,969, dated Ap'ril'2, 1895, wherein the harness orheddle frames are pro vided with detectors of the type specified. Inpractice such detector-heddles tend to become magnetized and to sticktogether in groups,

so that in the reciprocation of the frames to change the shed some ofthe heddles lie behind the others, resulting in impaired quality of thecloth being woven. These objections are overcome and their evil effectsprevented by my present invention.

Figure 1 represents in front elevation and centrally broken out asufficient port-ion of a loom to be understood with my invention appliedthereto. Fig. 2 is a cross-sectional view thereof on the line a: 00looking toward the left; and Fig. 3 is an enlarged perspective view,centrally broken out, of the evening device detached.

The stands A on the loom-frame A provide bearings for the usual overheadshaft a, having sheaves a, to which are attached flexible connections abetween the harness-frames, the latter comprising upright side bars I)and top and bottom cross-bars b 6 the bottom bars being connected to theusual actuatingtreadles, (not shown,) and all of well-known constructionin the type of warp-stop motion mechanism referred to, as'are also thenormally-vibrating feelers f f mounted on the rock-shaftf, Fig. 2,stoppage of a feeler by engagement with an abnormally-positioneddetector-heddle operating by or through suitable means (not shown)to'stop the loom upon tained wholly by the heddles, and, as hereinshown, said device consists of a rod or bar It, bent at its ends h atright angles to its main or body portion, said ends being longitudinallyslotted at b Fig. 3, and with their in ner faces h flattened or planedand in parallelism with each other.

In the present instance the supporting-bar Z) for the heddles isextended through the slots b of the evening device to guide the lat= termerely, the slots being of much greater length than the depth of theheddle-support b, so that the evening device It has a vertical movementindependent of the heddle-suport.

p Between its ends the under side of the evenin g-bar it rests upon theupper ends of the detector-heddles and is sustained vertically whollythereby, its weight being sufficient to overcome any tendency of some ofthe heddles to stick up higher than the others, as on the downstroke ofthe heddle frame the weight of the evener would come more fully upon andwould depress any lagging heddles, so that all will be moved in unison.

The evener does not in any way interfere with the dropping of a heddleupon-failure or undue slackness of its warp-thread, as the other heddlesat such time will sustain the evener.

Referring to Fig. 1, it will be seen that the evener straddles theseries of detector-heddles, the inner faces 71 of the ends h extendingoutside of and adjacent the fiat faces of the endmost heddles of theseries, so that said ends act as side stopsto limit lateral play ormovement of the heddles, and thereby pre serve the series in properupright position.

I-Iaving described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

1. In a warp stop-motion for looms, a series of actuating-detectorsmovable into operative position by breakage or undue slackness of thewarp-threads, a reciprocating transverse support for said detectors andrelatively to which they have a limited independent vertical movement,and an evening device supported by the upper ends of the detectors toinsure normal movement thereof in unison, said evening device having aportion thereof in engagement With and guided by the transversedetector-support and vertically movable relatively thereto.

2. In a warp stop-motion for looms, a series of actuating-detectorsmovable into operative position by breakage or undue slackness of thewarp-threads, a reciprocating transverse support for said detectors andrelatively to which they have a limited independent vertical movement,and an evening device extended above the upper ends of and supported bythe'detectors, said evening device having its ends turned in parallelismwith the length of the detectors and longitudinally slotted to receivethe transverse detector-support, to be guided thereby.

3. In a warp stop-motion for looms, a series of detector-heddles eachlongitudinally slotted near its upper end, a transverse, reciproeatingsupport for and extended through the slots of the heddles, the latterhaving limited vertical movement relative to said support, and anevener-bar having downturned, longitudinally-slotted ends to receive theheddlesupport and have vertical movement relative thereto, the underside of said bar between its downturned ends resting upon and beingsupported by the upper ends of the heddles, to insure normal movementthereof in unison.

4. In a warp stop-motion for looms, a series of detector-heddles eachlongitudin ally slotted near its upper end, a transverse, reciprocatingsupport for and extended through the slots of the heddles, thelatterhaving limited vertical movement relative to said support, and anevenerbar having downturned, longitudinally-slotted ends to receive theheddle-support and have vertical movement relative thereto, the barbetween its ends resting upon and being supported by the heddles, theinner faces of the downturned ends of the bar being flat and inparallelism, to engage and form side stops for the outermost heddles ofthe series and prevent lateral displacement of the series.

5. In a warp stop-motion for looms, a series of longitudinally slotteddetector heddles each provided with a warp-eye, a transverse,reciprocating support for and extended through the slots of the heddles,the latter having limited vertical movement relative to said support,and an evener-bar sustained wholly by the heddles and having its endsbent at right angles to its body portion, said ends being longitudinallyslotted to receive the heddle-support and be guided thereby, the Weightof the ev'ener-bar effecting normal movement of the heddles in unison.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing Witnesses.

JAMES H. NORTHROP.

Witnesses:

GEO. HUNTINGTON, ELIDA A. HUNTINGTON.

